The term 'BIREME MOVER' is a job description for someone who operates an OAR (3 letters). A bireme mover is responsible for rowing a boat, typically a large vessel such as a warship or cargo ship. This type of job was common in ancient times, when boats were the primary means of transportation. The bireme mover would use their oars to propel the boat forward, and also to steer it in the desired direction.